Companies House lookup: search UK companies instantly
Search any UK-registered company and get instant verified details from Companies House, the official UK business register. Covers 5M+ active UK companies. Free to use, no signup required.
Looking for automated lookups? Get your API key
What is this Companies House lookup?
This tool searches 8.8 million UK businesses by name or company number and returns the registered record enriched beyond what Companies House publishes: registered name and address, company number, UK SIC classification, status and legal type, plus contact details, employee counts and revenue figures where available.
Companies House itself is the authoritative source for filings and officers. What it does not give you in one screen is firmographics: how big the business is, what it turns over, and how to reach it. That enrichment, on top of the official register, is what this lookup adds, free and without an account.
Automate these lookups with our API
Send a company name or number, get the same records back as structured JSON. Classify a whole list in one run instead of searching them one by one. Every new key starts with 500 free lookups.
What is Companies House?
Companies House is the United Kingdom's registrar of companies, an executive agency of the Department for Business and Trade. Every limited company, LLP and a range of other entity types in England, Wales, Scotland and Northern Ireland must register there and file annual accounts and confirmation statements, all of which become public record.
Every registered company gets an 8-character company number that never changes, even when the business renames. That number is what you reference in contracts and KYB checks; the free search above resolves either the number or the current name to the live record.
UK businesses by county
Where the UK businesses behind this lookup are registered, counted live from our records.
Live counts from the CompanyData platform, measured October 2026 and refreshed automatically.
Largest UK businesses on file
Sorted by revenue, straight from the same records the lookup above searches.
| Company Name | Country | City | Address 1 | Phone | State/Province | Postal Code | Website | Founding Year | Yearly Revenue in U.S. Dollars | Employees Total | Business Legal Type - Description | Number of Companies in Group | Company Registration Number | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Uniper Global Commodities SE | *****@***.*** | Unitedkingdom | Queen'S Park | 42-44 Grosvenor Gardens | +** ******** | London | SW1W 0EB | N/A | 2022 | $251,958,056,339 | 879 | Foreign company | 6001 | FC039625 |
| 2 | Industrial And Commercial Bank Of China LIMITED | ******@****.*** | Unitedkingdom | Monument-aldgate-fenchurch Street-tower Hill | 81 King William Street | +** ********* | London | EC4N 7BG | *****.com | 2011 | $213,868,290,743 | 409,758 | Foreign company | 17488 | FC031145 |
| 3 | Agricultural Bank Of China LIMITED London Branch | *******@*****.*** | Unitedkingdom | Monument-aldgate-fenchurch Street-tower Hill | 7/f 1 Bartholomew Lane | +** ******** | London | EC2N 2AX | *****.com | 2017 | $193,676,531,992 | 457,835 | Foreign company | 23841 | FC034858 |
| 4 | China Construction Bank CORPORATION London Branch | ********@******.*** | Unitedkingdom | Monument-aldgate-fenchurch Street-tower Hill | 111 Old Broad Street | +** ********* | London | EC2N 1AP | *****.com | 2014 | $191,593,731,879 | 378,344 | Foreign company | 30864 | FC032309 |
| 5 | Banco Do Brasil S.A. | *********@*******.*** | Unitedkingdom | Monument-aldgate-fenchurch Street-tower Hill | 3rd Floor | +** ******** | London | EC2M 4AG | *****.br | 1808 | $172,814,305,439 | 69 | Foreign company | 5405 | FC006852 |
| 6 | The Shell Company Of Thailand LIMITED | **********@********.*** | Unitedkingdom | Balham | Shell Centre | +** ********* | London | SE1 7NA | *****.com | 1913 | $143,573,019,801 | 476 | Corporation | 5522 | 00130588 |
| 7 | Wells Fargo Bank, National Association | ***********@***.*** | Unitedkingdom | Monument-aldgate-fenchurch Street-tower Hill | 33 King William Street | +** ******** | London | EC4R 9AT | *****.com | 1997 | $123,529,000,000 | 205,198 | Foreign company | 8736 | FC026633 |
| 8 | Mitsubishi CORPORATION | ************@****.*** | Unitedkingdom | City of London | Mid City Place | +** ********* | London | WC1V 6BA | *****.com | 1992 | $118,225,000,000 | 180 | Foreign company | 2425 | FC022100 |
| 9 | Credit Agricole S.A. | *****@*****.*** | Unitedkingdom | Shoreditch | 3rd Floor Broadwalk House | +** ******** | London | EC2A 2DA | *****.com | 1984 | $113,995,132,368 | 80,518 | Foreign company | 5532 | FC012270 |
| 10 | Hd Hyundai Heavy Industries CO., LTD | ******@******.*** | Unitedkingdom | West Kensington | The Triangle 2nd Floor | +** ********* | London | W6 0LG | *****.kr | 2019 | $112,339,111,165 | 38 | Foreign company | 49 | FC036566 |
Showing 10 of 8,228,232 companies
Request Free SampleHow it works
Enter a company name or registration number in the search box, then run the search
Open a result to load full company details from our database (sourced from official registers where available)
Use the verified fields for due diligence, sales, or compliance. No signup required
What people use this lookup for
verify a British company before signing contracts
confirm UK business registration during onboarding
look up UK company details for outreach
check a UK supplier's registration status and legal type
Frequently asked questions
What is Companies House?
Companies House is the UK government's official register of companies. Every limited company in England, Wales, Scotland, and Northern Ireland must register there.
How do I search Companies House for free?
Enter a company name or registration number in the search box above for instant results. Alternatively, visit companieshouse.gov.uk directly.
What information does a Companies House lookup return?
Company name, registration number, address, SIC code, legal type, incorporation date, directors, and filing status.
What is a Companies House number?
A unique 8-digit number assigned to every UK company at registration. Also called a company registration number or CRN.
Is this better than searching Companies House directly?
This tool returns enriched data including revenue estimates, employee counts, and industry classifications not available from Companies House alone.
No integration, no code. The same enriched register as a ready-made Excel or CSV file: pick your SIC codes, regions and sizes, and get a free sample first.